// 类的用法
(function () {
    var Person = /** @class */ (function () {
        // 构造器
        function Person(firstName, lastName) {
            this.firstName = firstName;
            this.lastName = lastName;
        }
        return Person;
    }());
    function showName(person) {
        return person.firstName + "_" + person.lastName;
    }
    var person = new Person('东西', '南北');
    console.log(showName(person));
})();
